The Chinese calendrical arts, native on your Mac. "Observe the sky, grant the time" — for millennia, Chinese astronomers read the sun, moon and stars to fix the calendar. Four Pillars Studio turns that tradition into a rigorous modern tool: professional Four Pillars (Bazi) charting, a full ganzhi almanac calendar, and date selection. Every reading lists its classical sources, so you can check the work. BUILT FOR THE MAC · A fully native macOS app, not a mobile port: sidebar navigation and wide multi-column charting · Full keyboard shortcuts and menu-bar commands for serious study · Light and dark appearance follow the system; motion follows macOS design conventions PROFESSIONAL CHARTING · True solar time correction by birthplace longitude — no pillar is ever off · Automatic alerts for 1986–1991 Chinese daylight-saving births · Stems & branches, Five-Element strength, Ten Gods, symbolic stars, hidden stems, twelve growth stages · Yin-yang stem qualities and wet/dry, hot/cold seasonal balancing · Luck pillars & yearly cycles, read year by year THE GANZHI ALMANAC · A calendar of daily stem-branch pairs, solar terms and moon phases · The twelve double-hours, kept the classical way · Daily guidance following the Qing imperial almanac (Xieji Bianfang Shu) DATE SELECTION · Seven scenarios: weddings, moves, openings, contracts, travel and more · Multi-layer scoring against your own chart, with reasons for every recommendation A SCHOLAR'S TOOLBOX Instant charting, Gregorian-ganzhi conversion, benefactor directions, an auspicious compass, chart comparison, synastry, naming reference and more — ten desk tools for serious students. BUILT ON THE CLASSICS The charting and reading system follows the Yuanhai Ziping, Sanming Tonghui, Di Tian Sui, Ziping Zhenquan, Qiongtong Baojian and the Xieji Bianfang Shu. See the in-app acknowledgements for the full list. All computation runs on our in-house Yuanhai engine. PRIVATE BY DESIGN Everything is computed on your Mac. No account and no automatic upload. Your data is never sent to us; a file is created only when you choose to export it. Free forever: your chart, the ganzhi calendar and daily guidance. Go Pro for deep readings, unlimited charts, luck cycles and the 30-day date picker — monthly ($4.99), yearly ($49.99), or one lifetime purchase ($89.99). Buy once, unlock on iPhone, iPad and Mac. — Subscriptions renew automatically and can be cancelled anytime in your App Store account settings. Prices may vary by region. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Rooted in traditional Chinese calendrical culture; for cultural study and reference only — not medical, legal or financial advice.
Reference · iPhone, iPad · Free
